Vacuum feed apparatus



F. V. RISINGER. VACUUM FEED APPARATUS. APPLICATION FILED MAR 1, 1920,

Patented May 10, 1921.

, receptacle, a,

n, or CHICAGO,

amaze.

Specification of Letters Patent.

vacuum FEED APPARATUS.

ratentearra 10, 1921.

Application filed March 1, 1920. erial No. 362,596.

To all whom it may concern.

Be it known that I, FRANK V. RISINGER, citizen of the United States,residing at Youngstown, county of Mahoning, State of Ohio, have inventeda certain new and useful Improvement in Vacuum Feed Apparatus, anddeclare the following to be a full, clear, and exact description of thesame,

such as will enable others skilled in the art' to which it pertains tomake and use the same, reference being had'to the ing drawings, whichform a part of this specification.

The purpos of this invention is to provide an improved device for thepurpose of supplying liquid fuel to the carbureter of an internalcombustion engine from a source of supply lower'than the carbureter.Itconsists in the elements and features of, con-.

struction shown and described, as indicated in the claims.

In the drawings: I

Figure 1 is an axial section of a device embodying this invention.

Fig. 2 is a section at the line, 2-2, on Fig. 1. v

Fig. 3 is a view similar tothe upper part of Fig. 1, showing the movableparts at different positions.

Figs. 4 and 5 are details of a valve member for controlling the suctionconnections and atmosphere inlet.

In the construction shown in the drawings, a is a receptacle designed tobe located in a position for supplying thefuel by gravity to thecarbureter of an engine, and deriving its supply from a main supply tankat a lower level which is not shown. The

has an outlet, (5, for conducting th fuel to the carbureter, and aliquid inlet, f, through which the liquid is derived from the low levelmain tank. Witl in the receptacle, a, there is pivotally mounted avacuum chamber, 6, provided with an axle member, 0 extending through itand by means of which it is pivoted for rocking, the pivot axis beinglocated with respect to the center of gravity of the entir vacuumchamber and fixed-appurtenances hereinafter mentioned when said chamberis empty of liquid, so that it will be overbalanced toward one end,hereinafter referred to as the heel end,that is, the end nearer saidaxis,said chamber belng extended toward the other end somewhat inaccompanyat th top by a cap spoon-like form for glving it at normalempty position a liquld capacity from the level of the axis downward,great relatively to the liquid capacitypf the correspondling portionfrom the axis toward the heel end; so that when filled with the liquidto a level somewhat he axis, the excess of liquid in the longer spacetoward the toe end, over that in the shorter space toward the heel endI'e- .verses th overbalanclng,

causing the chamber to be overbalanced toward the toe end. T reoverbalancing of the chamber toward the heel end when empty,notwithstanding the lesser capacity of that end portion, is effected byproviding an exterior weight member, 6 on' the lower side, which may besupplemented for convenience of accurate adjustment by a weight member,6 mounted inside the chamberfmainly above the high liquid level thereof,so as to not materially affect the liquid capacity up to that level. Thmember, 6 is adapted also to act as a buoyor float by being lighter thanthe liquid with which the receptacle, a, is to be supplied, operating assuch buoy for a purpose hereinafter explained. For lconvenience ofconstruction the'receptacle is closed member, a having a boss, o towhich the liquid inlet connection, 7, is made. Projecting inwardly fromthe cap plate in continuation of the inlet passage, there is provided aliquid discharge nozzle, f terminating in a tapered valve member, 6; andthe vacuum chamber, 6, is provided with a liquid inlet aperture, 6positioned to be entered by the valve member, Z), and to be closedthereby as to communication of the vacuum chamberwith the receptacle, a,when the vacuum chamber is swung up to what may be termed its normalempty position, at which its plane of greatest length is substantiallyhorizontal, as seen in Fig. 1. WVit-hin the vacuum chamber, 5, there ismounted a float, 9 carried by a stem, of a valve, 9, adapted to seatinwardly with respect to the vacuum chamber for closing an atmosphereport, 6 located at substantially the highestpoint of saidvacuum-;:chamber. The valve stem, 9 is loosely guided for keeping it insubstantial or approximate alinement at all positions in the opening andclosing movement of the valve and rising and falling movement of .fuel'to a sufficient height pheric pressure the float, by means of a guidefitting, 6 mounted in the bottom of the vacuum chamber and verticallyapertured for loosely receiving the lower end of the valve and floatstem; and between the upperend of said fitting and the float thereisprovided a light coil spring, 9 designed to be adequate tocounterbalance the weight of the valve stem Fig. 2, by which atmosphericpressure is at ed by means of its axle, c, in a hanger,

all times present in said receptacle above the liquid contents thereof.

The vacuum chamber is pivotally mountone end depending from the capplate, (1 and a hanger, 0 at the other end, also depending from the capplate, and connected thereto at an aperture therethrough at which at theouter end there is connected a suction p1pe,s, leading from any suitablesource of suction, as for example, and as will usually be the case, theintake manifold of the engine to be servedby the device. The stem of thehanger, 0 1s apertured as shownat e, in/

1 continuation of the suction outlet passage very short distanceextending in toral disk form,

'The inner face of the hanger,

' chamber by means through the suction connection p pe, 5. Thls duct. eturns at a right angle so as to emerge in the inner face of the hanger,and spaced a below this paraxially-extending branch, there is provided aduct, 6

from the same face, and turning at right angles to extend downwardly inline with the downwardly-extending portion of the duct, 6, to a'point inlinewith the axis of the axle, c, and thence turning inward in line withsaid axis, terminating at the inner face of the hanger; and into thislower terminal the axle, 0, is entered, and thereby obtains its pivotbearin at that end, being held accurately positione bya ppinted screw, 6set through the opposite-hanger, e, and adjustable at that end 6 throughwhich'the angled duct, e enters, constitutes the valve seat, for a valvemember, h, of secwhich is mounted upon the axle by means of an.aperture, h in t e lower end and engaged with the vacuum of a stud, e",projecting from the proximate end of that chamber, and engaging theslot, h in the upwardlyextending radial arm, of said sectoral valvemember and spring-pressed toward said seat by a spring, h. On the faceof said valve member towardthe hanger seat .mouths, e and 6*,

. is provided with hubs, 0

e, at

. low level supply a direction parallel to the axis at ofv the axle.

it has an elongated as to lap the mouths of the parallel portions, ofthe ducts, e and 0*, in the hanger, 6 said sectoral valve member beingmounted on the axle, c, rigid with the vacuum chamber at such positionthat at the-normal empty position said recess is registered with saidduct and constitutes a connectien between them, thereby making the suetion inlet passage from the pipe, 8, continuous tothe end of the axle,c; and said axle is bored from the end for registering with the alined'terminal of the duct, 0 in the hanger, as seen at 0 The vacuum chamberwhich is shown as made of sheet metal,

and .0, at its opposite ends, and the hub, 0, at the axially bored endof the .axleand. the axle itself is radially bored for connection of anupstanding duct member, 8 whose duct constitutes a continuation of theaxial duct, 0 of the axle, said-duct member, 8 upper part of the cavityofthe vacuum chamber as seen in Fig. 1. Thus at the normal or emptyposition of the vacuum chamber it is in communication at the upper partwith the suction connection through the pipe, 8; and upon suctionproduced by the operationof the engine, partial vacuum is produced inthe vacuum chamber, as the atmosphere port, If, is closed, such suction,producing such partial vacuum, causing the liquid to be lifted from themain tank to the inlet supply pipe, f, and discharged through the duct,f

recess, h, of such length.

of the vacuum chamber,

opening at the i so long into the vacuum chamber until the same be thethe liquid level has arisen substantially contents will overbalancepositioned that atitsliquid-filled position',- a

that is, when occupied with liquid up to the level for operatmg thefloat, g, the center of gravity of the chamber and its contents, is,aboveas well as slightly at'the right of the vertical plane of theaxis, so

that upon the slightest movement in the overbalanced direction, ity iscarried still further that is, toward the toe end. This circumstance,together with the fact that the liquid immediately starts to flow towardthat end, causes the dumping to be abrupt so as to be completed withcertainty when it is once begun; and thereby the liquid contents. of thevacuum chamber are discharged through the port, 6 into the receptacle,a. By this over to the right,-

the center of grav- I the valve, 9,

. discharge port, 6,

discharge the overbalancing of the vacuum chamber is reversed and ittends immediately to return to its normal empty position, the valve, 6closing the port, 6 and the atmosphere valve, 9, being closed, being nolonger supported by the float, g, in the absence of liquid in the vacuumchamber; and the suction connection, which is cut off by the initialmovement of the vacuum chamber from its empty position in dumping, beingrestored by the restoration of the chamber to said normal emptyposition, the suction operates to fill the vacuum chamber and cause arepetition of the cycle of movement above described.

In case of high suction tending to hold seated at the atmosphere inlet,Z), against the buoyant action of the float, g, until the latter isdeeply immersed in the liquid, the increased overbalancing of the vacuumchamber toward the toe end will by the increased liquid contents,eventually cause it to be tiltedv to open the fitting and and the vacuumwill be broken by air bubbling in through the outflowing liquid at saiddischarge port.

The applied combined weight and buoy, 71 is positioned as shown in Fig.1 where it is increasingly immersed in the liquid contents of thereceptacle, 0, as the liquid level in said receptacle rises past acertain point; and said member, 6 is proportioned and positioned on thevacuum chamber for buoying up the heel end of the vacuum chamer at apredetermined level of liquid in the receptacle, 6, so that its buoyancywhen immersed beyond a certain point, holds the vacuum chamber tilteddownward or away from its empty position far enough to cut off thesuction connection; and thereby the operation of the device is suspendedso long as the liquid level in the receptacle, 0, re mains at thatpredetermined height, thus preventing possibility of the device beingflooded by the supply being more rapid than the consumption orrequirements of the engine.

The weight-buoy, b is conveniently utilized also for checking thedown-tilting of the vacuum chamber at empty position by the collision ofthe said weight-buoy, 6 or projection, b, thereon, with the wall of thereceptacle, 4, at the proper limit of said down-tilting as seen in Fig.3.

I claim:

1. In a device for the purpose indicated, in combination, a receptaclefor liquid fuel having an atmosphere inlet, a liquid outflow connectionfor supplying a carbureter, and

! liquid inflow pOIlIlQCtlOIl from a lower source of liquid fuel supply;a vacuum chamber mounted pivotally wvithin said receptacle havingconnection with a source of suction exterior to said receptacle, andhaving a liquid inlet ort positioned for registering with the liquidinlet connection of the receptacle at one position to which ,it may beturnedabout its pivot; said vacuum chamber being formed and pivoted sothat when empty of liquid it is normally overbalanced in the directionfor holding said liquid inlet port in registration with said liquidinlet connection, and valve means at inlet registering position of thevacuum chamber for closing the communication of the liquid inlet port ofsaid chamber with the receptacle, whereby at said empty position of thevacuum chamber liquid is sucked thereinto from the main low level fuelsupply source.

2. In the construction defined in claim 1 foregoing, the vacuum chamberhaving an air inlet at the upper part communicating with the receptacle;a valve for controlling the said air inlet positioned with respect toits seat for being held closed by suction in the vacuum chamber, and afloat in the vacuum chamber operatively connected with said valve foropening it on predetermined rise of liquid in said vacuum chamber.

3 In the construction defined in claim 1 foregoing, the vacuum chamberhaving a suction duct opening at the upper part of said vacuum chamberand leading out through one head of the chamber, the bearing of thechamber of the receptacle adjacent to that head having a suction ductleading out for exterior connection and registering with the suctionduct of the vacuum chamber, t e vacuum'chamber having a valve membercarried with it in its rocking movement which cuts off the duct in thebearing upon movement of the vacuum chamber away from normal emptyposition.

, 4. In the construction definedin claim 1 foregoing, the vacuum chamberhaving a counterbalancing appendage lighter than the liquid to besupplied by the device, whereby it is adapted to operate as a buoy when'submerged'in said liquid, said appendage being positioned at the lowerside of the vacuum chamber relatively to the fulcrum, so that. itscenter of buoyancy in submergence to a predetermined degree, moves upward to the tilting of the vacuum chamber away from its normal emptyposition, whereby upon the filling of the receptacle to a predeterminedheight, the vacuum chamber is tilted away from its normal empty positionregardless of its liquid contents.

In testimony whereof, I sign this specification.

FRANK V. RISIN GER.

the liquid

